53 lines
1.4 KiB
Elixir
53 lines
1.4 KiB
Elixir
# Pleroma: A lightweight social networking server
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# Copyright © 2017-2019 Pleroma Authors <https://pleroma.social/>
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# SPDX-License-Identifier: AGPL-3.0-only
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defmodule Pleroma.Web.Plugs.HTTPSignaturePlug do
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alias Pleroma.Web.ActivityPub.Utils
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import Plug.Conn
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require Logger
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def init(options) do
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options
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end
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def call(%{assigns: %{valid_signature: true}} = conn, _opts) do
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conn
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end
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def call(conn, _opts) do
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user = Utils.get_ap_id(conn.params["actor"])
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Logger.debug("Checking sig for #{user}")
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[signature | _] = get_req_header(conn, "signature")
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cond do
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signature && String.contains?(signature, user) ->
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# set (request-target) header to the appropriate value
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# we also replace the digest header with the one we computed
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conn =
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conn
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|> put_req_header(
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"(request-target)",
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String.downcase("#{conn.method}") <> " #{conn.request_path}"
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)
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conn =
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if conn.assigns[:digest] do
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conn
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|> put_req_header("digest", conn.assigns[:digest])
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else
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conn
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end
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assign(conn, :valid_signature, HTTPSignatures.validate_conn(conn))
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signature ->
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Logger.debug("Signature not from actor")
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assign(conn, :valid_signature, false)
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true ->
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Logger.debug("No signature header!")
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conn
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end
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end
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end
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